Knob-lock



(No Model.) 2 sheets-Sheena.

W. A1. HILL. KNOB LooK.

No. 582,917. Patented May 18, 1897.. T31. 5 A

NITE

VILFORD A. HILL, OF VALTHAM, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO JOIIN O. MILLER, OF MELROSE, MASSACHUSETTS.

moa-LOCK.,V

SPECIFICATION forming part of Letters Patent No. 582,917, dated May 18, 1897.

Application iiled January 1l, 1897. Serial No. 618,714. (No model.)

.To all whom t may concern:

Be it known that I, WrLnoRD A. HILL, of Valtham, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Kn ob-Locks, ot which the following is a speciiication.

This invention relates to a combined latch and lock the locking-bolt of which is operated by two knob-shanks, an outer and an inner, the shanks being separable and adapted to interlock, so that both will operate in unison and the rotation of either shank by its knob will retract the bolt, or to be separated, so that the rotation of-only the inner knob and its shank will retract the bolt, the outer knob and shank being provided with a keyhole for the reception of a key which under certain conditions is adapted to retract the bolt when the outer knob is inoperative.

The invention consists in the several improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 is a view of a portion of a door fitted with my improved lock. Fig. 2 is a horizontal sectional view of the same on the line 2 2 of Fig. 1. Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 1. Fig. 4: is an end view showing the outside-knob and the key inserted therein.

Figs. 5, 6, and 7 are vertical sectional views showing the dierent relative positions of the of Fig.9 Figs. 11 and 12 are detail perspective views of the two knob-Shanks. Figs. 13 and 14 represent views of the key. Fig 15 represents a section on line 15 15, Fig. 13. Fig. 16 represents a transverse section of the outer knob-shank, taken on the line 1G 16, Fig. 6. Fig. 17 represents a detached View ofthe clutch member of the inner knob-shank.

In the drawingsrepresents a door to which my improved mechanism is applied, and Z9 c represent the inner and outer knobs, attached, respectively, to Shanks b and c. The inner shank b' is movable longitudinally and is pro-V vided with a series of grooves b3 b4 b5, each adapted to engage a movable locking-plate t' on the inner side of the door, said plate being preferably adapted to slide on the inner knob- The inner ends of the two Shanks are provided with interlocking clutch members, the shank b having awedge-shaped clutch member the face b2 of which is inclined relatively to the axis of the shank and is provided with a recess o, adapted to receive and fit the inner end of the key g, so that when the key is inserted in said recess and rotated it will rotate the shank b'. The clutch member of the shank c is here shown as a notch or recess c2, formed to receive the apex of they wedgeshaped clutch member on the shank b'. Y

d represents the locking-bolt, which has a beveled outer portion d, projecting through the edge of the door. Said bolt is movable longitudinally in a casing c, which is preferably cylindrical and is inserted in a circular mortise formed in the door, the casing being affixed to the door by screws passing through a flange on the outer end ofthe casing. The bolt d has an opening cl2, which receives the Wedge-shaped coupling member b2, and is provided in said opening with a spring-pressed follower bs, which is caused by a spring b9 to bear yieldingly against one side of the wedgeshaped member b2, as indicated in Fig. 2. The rear portion d4 of the bolt d, constituting the rear wall of the opening d2, is yieldingly pressed against the wedge-shaped member b2 by the spring b9, the bolt being thus yieldingly projected as far as the wedge-shaped inember b2 will permit.

The follower bs and its spring b9 are supported by the bolt d, so that when the bolt is removed the followerand spring remain connected with it, the operation of separating and assembling the parts of the lock being thus simplified.

The key .g is provided with a flat-sided inner end portion g', adapted to fit the recess h6 in the inner shank, so that when the key and recess are engaged the rotation of the key will rotate the inner shank. The key is also provided with longitudinal grooves g2 g2 and IOO g3 g3 and with peripheral grooves gi y, the grooves g2 extending from the inner end of the key to the groove g5, as shown in Fig. 13, while the grooves g3 extend to the groove y, as shown in Fig. lt.

The outer shank c/ is provided with two studs e5 c5, Fig. 1G, arranged to coincide with and enter the grooves g, and with two studs c e, arrangetl to coincide with the groove y when the inner shank b is in the position shown in Fig. 6. The studs c5 also coincide with and enter the longitudinal grooves g'n' and the studs c the longitudinal grooves ffl when the key is being inserted. Said studs and longitudinal grooves therefore prevent the key from being turned until its grooves g5 g coincide with the studs ci e, the grooves g5 g then permitting the rotation of the key. Then the inner shank is in its inner position, (shown in Figs. l, Q, and 5,) the key cannot be inserted far enough to bring the grooves (/5 gj into coincidence with the studs ci c". Itenee the key cannot be turned until the inner shank ismovcd tothe position shown in Fig. fi, the grooves g then coinciding with the studs cl. It will be seen that the grooves in the key and the studs in the outer shank require a predetermined position of the key relativelyv to the shank before the key can be turned, and therefore provides for the desired individuality7 of each lock and key, a slight variation in the arrangement of the studs in two diierent locks preventing the same key from operating both, it being necessary that the arrangementof the peripheral grooves in the key conform exactly to the arrangement'. of the studs in the outer shank.

The operation of the described mechanism is as follows: Then the inner shank b is pushed inwardly and engaged with the outer shank c, as shown in Fig. Q, a rotation ot either knob will cause the retraction of the bolt d, the coupling member b2 of the inner shank being oblong in cross-section, so that a quarter-rotation of the shanks will retract the bolt, as indicated in Fig. \\`hen the inner shank is drawn outwardly to the position shown in Fig. ti, the clutch members of the two shanks are separated, so that t-he rotation of the outer knob will not atiect the bolt. The bolt can be retracted, therefore, from the outside of the door only by the use of the key g, which can only be used when the inner shank is in this position, as above described. \Yhen the inner shank is moved to the extreme outward position, (shown in Fig. 7,) its clutch member L? permits the bolt d to be projected and brings its inn er end portion df1 into a position to obstruct the keyhole, so that the bolt cannot be retracted from the outside by any means, the portion dl constituting a stop preventing the insertion of the key or any other instrument into the recess Ul. It will be seen that when the keyhole is thus obstructed the bolt is at its maximum projection and effectively fastens the door. The studs c5 CG in the outer shank serve also to so contract the key-opening through said shank as to prevent the insertion of an effective wire or other appliance intended to iraiululently unlock the door. A spring ci is connected with the outer shank e and no1'- mally holds a pin e on said shank against a stop-shoulder c' on the casing e, as shown in Fig. S. The casing has a segmental slot el at one side of the shoulder d, which permits the shank c' to make a half-rotation. The shoulder e projects into a groove eg in the shank c and prevents longitudinal movement et said shank and its removal from the door. The inner shank should be provided with suitable stops to limit its outward and inward movements. I prefer to make the coupling member Ut on the inner shank in a separate piece and connect it adjustably with said shank to compensate for variations in the thickness of dii't'erent doors. In Fig. 17 I show the said member Ui provided with a split .stem ZF", adapted to be engaged and held at various longitudinal adjustments by a setscrew D", Fig. (t, which may have a 'conical inner end adapted to enter the slot in the stem ZIJ" and spread the latter. The lockingplat'e may be provided with a spring 20, Fig. 23, adapted to yieldingly hold said plate in its operative position. The said locking-plate slides in a grooved boss t, formed on a plate 23, atixed to the door. Said boss is preferably eut away at. one side, forming an opening 1?, Fig. 3, through which the grooves in the inner shank may be seen when said shank is being adjusted.

I do not limit myself to the employment ot' interlocking clutch members on the shanks D c', as the said members may he dispensed with in case it is desired to operate the lock only by means et a key.

I claiml. A door lock and latch comprising knobshanks having interlocking clutch members at their inner ends, the inner shank being longitudinally movable, and the outer confined against longitudinal movement and provided with a keyhole; a bolt directly engaged with the inner shank, and free from direct engagement with the outer shank; and means for engaging the inner shank wit-l1 the door in ditl'erent positions, namely, iirst, when intierlocked with the outer shank, so that rotation of either knob will retract the bolt, and secondly, when separated from the outer shank, so that rotation of the outer knob will not retract the bolt, the inner shank lxaviuga key-engaging cavity coinciding with the keyhole in the outer shank, so that when the inner shank is in its second position it may be rotated to retract the bolt by a key inserted in the outer shank.

2. A door lock and latch comprising an inner and an outer shank, the inner shank being longitudinally movable and the outer provided with a keyhole, a bolt engaged only with the inner shank, and means for engaging the inner shank with the door in different TOO IIO

positions, one of which makes the bolt operative by a key inserted in the outer shank, while the other Vmakes the bolt inoperative by the key.

3. A door lock and latch comprising an inner and an outer knob-shank, the inner shank being longitudinally movable, and the outer confined against longitudinal movement, means for engaging the inner shank with the door in different positions, and a springprojected bolt engaged with the inner shank and bearing yieldingly against it, the said inner shank being formed so that a longitudinal change of position of the shank effects a longitudinal change of position of the bolt.

al. A door lock and latch comprising an inner and an outer knob-shank, the inner shank being longitudinally movable and the outer confined against longitudinal movement, and provided with a keyhole, said inner shank being formed to permit a varying projection of the bolt, and a stop movable with the bolt and held in position to obstruct the keyhole and prevent the use of the key when the bolt is at its maximum projection; means for engaging the inner shank with the door in different positions; and a spring-projected bolt engaged with the inner shank and bearing yieldingl y against it.

5. A door lock and latch comprising an inner knob-shank having a series of lockinggrooves between its ends and the knob, said inner shank being longitudinally movable; an outer shank confined against longitudinal movement, and having a longitudinal keyhole; a movable locking device or detent adapted to engage either of said grooves to hold the inner shank in different positions; and a bolt yieldingly pressed against the inner shank and project-ed in accordance with the longitudinal adjustment ot the said shank, said bolt having a stop which obstructs the keyhole in the outer shank when the bolt is fully projected.

6. A door lock and latch comprising an inner knob shank having a wedge -shaped `clutch member at its inner end and a series ot looking-grooves between its ends and the knob, said inner shank being longitudinally movable, an outer shank having a recess to engage said clutch member and a longitudinal keyhole, a locking device to engage said grooves and hold the inner shank in different positions, and a bolt yieldingly pressed against the wedge-shaped end of the inner shank and projected in accordance with the longitudinal adjustment of said shank, said bolt having a stop which obstructs the keyhole in the outer shank when the bolt is fully projected.

7. A door lock and latch comprising an inner and an outer shank, the inner shank being longitudinally movable and provided with a key-receiving recess, and the outer provided With a keyhole and with studs projecting into the keyhole, means for engaging the inner shank with the door in different positions, and a key having longitudinal and peripheral grooves adapted to cooperate as described with said studs.

8. A door lock and latch comprising an inner and an outer shank having interlocking clutch members at their inner ends, one of said members beinglongitudinally adjustable to compensate for differences in the thickness of different doors.

9. A door lock and latch comprising an outer and an inner shank, one of said shanks being longitudinally movable, and a bolt having a slot or opening to receivesaid movable shank and a spring-pressed follower car-- ried by the bolt and located in said opening.

10. A door lock and latch comprising an outer and an inner shank, the former having a series of grooves, a bolt operated by said inner shank, a sliding locking-plate adapted to engage either of said grooves, and a guide for said plate having a slight opening to expose the grooves in the shank.

ll. A door lock and latch comprising an outer and an inner shank, the former having a seriesof grooves, a bolt operated by said inner shank, a sliding locking-plate adapted to engage either of said grooves, and a spring which yieldingly holds the locking-plate in engagement with the inner shank.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 29th day of December, A. D. 1896.

IVILFORD A. HILL. lVitnesses:

JOHN C. MILLER, E. BATCHELDER. 

